Pterophyllum altum

It has been 72 hours since I took the 18 juvenile altums home, I lost 4 of the 18 - which is better than the previous experience. I have kept my water temperature at a constant of 32 degrees centigrade and intermittently added Sera's Baktopur (I am on a drip system with water being continuously replaced maintaining almost zero to none of the nitrates). Still keeping my fingers crossed as I do not have the luxury of time.